ppsspp has been updated today, to now version 1.4 of this psp emulator, here's whats new.

Support D3D11 (performs better than OpenGL or D3D9 on most hardware)
Audio quality improvement (linear interpolation) (#8950)
Hardware spline/bezier tesselation in OpenGL, D3D11 and Vulkan (...)
Post-processing shaders in D3D11
Prescale UV setting removed, now the default (improves perf) (#9176)
High DPI display fixes
Various fixes for UMD switching for multi-UMD games (#9245, #9256)
New audio setting to improve compatibility with Bluetooth headsets
Various desktop gamepad compatibility fixes
Workaround for mipmap issue, fixing fonts in Tactics Ogre Japanese
Assorted minor compatibility fixes, code cleanup and performance improvements


Download, the windows and android builds here